what are the files that required for active directory to run successfully?

Hi Muppuri, The Windows 2003/2008 server OS installation disc is required. How to install Active Directory on Windows Server 2003 http://technet.microsoft.com/en-us/library/aa998088(EXCHG.65).aspx How to Install Active Directory and DNS http://msdn.microsoft.com/en-us/library/ms942145(CS.70).aspx Brent Hu, TechNet Subscriber Support in forum If you have any feedback on our support, please contact tngfb@microsoft.comPlease remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.